How long are candidates' previous A Level exams scripts keep?e.g.Edexcel

I'm just wondering that whether our exam papers would keep forever? If they do ,what's the approximate time length ? In my view, I guess they may keep our scripts but not a long time ,like a year?

Well, for those who took their exams in summer 2024, they could request access to their marked papers (often referred to as "scripts") until 13 December 2024. So even if they keep them beyond then, they're no longer accessible.
However, given that a request for a Review of Marking can be followed by an Appeal to Edexcel, which can be followed by an Appeal to Ofqual's Examinations Procedures Review Service, they'll need to retain scripts for a while in case they're required by those processes. They won't be allowed to keep them forever, as the UK General Data Protection Regulation and the Data Protection Act 2018 mandate that data is "kept for no longer than is necessary". I think you guess of a year is a reasonable one.

What a professional explanation！Thank you for response！ But if that's the case, then many years after, if someone doubt the fairness of a candidate's score,such as cheating, how should the authorities re-examine their' grades? Or is there a time limit for the review of candidates' grades?

Thank you. I try.
If a suspicion of cheating arises "after many years" then it would too late to rely on the student's paper to provide evidence either way. So it looks like you may have got away with it.

Oh well,it sounds like not fair to students who really study hard , nobody can guarantee the real fairness,may be

I'm not sure that I agree. There are plenty of opportunities to detect cheating. It's the "many years after" which is problematic.
What's the scenario where "someone doubt the fairness of a candidate's score"? In this scenario, has the cheater admitted to cheating? Or do they not appear to have the knowledge that their grade would suggest they should have? Or something else?

For example,a university find that a student demonstrates bad capability of learning,but the Alevel grade of the student was very high than his/her GPA.
As a consequence,the university doubt the alevel score of this student